fix(reconciler): index missing for token updates

pkg/migrations/apidb/11_add_user_token_balances_indexes.go

@@ -0,0 +1,43 @@
+package apidb
+
+import (
+	"context"
+	"log"
+
+	"github.com/uptrace/bun"
+)
+
+func init() {
+	Migrations.MustRegister(func(ctx context.Context, db *bun.DB) error {
+		log.Println("adding unique indexes to user_token_balances...")
+
+		// These unique indexes back the ON CONFLICT upserts in reconciler/store/pg.go.
+		// Because the identifier columns are nullable, PostgreSQL allows multiple NULL rows
+		// in a unique index (NULL != NULL), so rows without a given identifier do not conflict.
+		for _, ddl := range []string{
+			`CREATE UNIQUE INDEX IF NOT EXISTS idx_utb_fingerprint_token
+				ON user_token_balances (fingerprint, token_symbol)`,
+			`CREATE UNIQUE INDEX IF NOT EXISTS idx_utb_evm_address_token
+				ON user_token_balances (evm_address, token_symbol)`,
+			`CREATE UNIQUE INDEX IF NOT EXISTS idx_utb_canton_party_token
+				ON user_token_balances (canton_party_id, token_symbol)`,
+		} {
+			if _, err := db.ExecContext(ctx, ddl); err != nil {
+				return err
+			}
+		}
+		return nil
+	}, func(ctx context.Context, db *bun.DB) error {
+		log.Println("dropping unique indexes from user_token_balances...")
+		for _, ddl := range []string{
+			`DROP INDEX IF EXISTS idx_utb_fingerprint_token`,
+			`DROP INDEX IF EXISTS idx_utb_evm_address_token`,
+			`DROP INDEX IF EXISTS idx_utb_canton_party_token`,
+		} {
+			if _, err := db.ExecContext(ctx, ddl); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}